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Hi there, I have a 1995 Buick Riveria with a
Sent to Car Experts March 25 09:32 PM

Hi there,

      I have a 1995 Buick Riveria with a supercharged 3.8 ltr 3800 series engine and the problem is that while starting off the car has a slight shutter. Not sure if this is the engine or transmission. But when going about 30 mph it seems fine. When I get to about 45 mph or higher the RPM's seem to drop off about 500 and the car shutters hard. I have to leave off the gas pedal and give more gas to get the RPM's to go back up and get the power to go faster. This will hold for about 3-5 seconds then drop back down. So I have to keep pumping the gas pedal about every 3-5 seconds to keep going. If I try and give more gas while the RPM's have already dropped the car just shutters bad. I have to actually leave off the pedal entirely then re-apply to get this to work. I was not sure if it was the fuel pump loosing pressure, or the fuel pressure regulator going bad, or the overdrive switch failing and engaging too early or what. I have replaced the fuel filter and plugs and wires to no prevale. Please help!!!! Thanks so much.

 

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1995 Buick Riviera 3.8

Already Tried:
Hi there, I have a 1995 Buick Riveria with a supercharged 3.8 ltr 3800 series engine and the problem is that while starting off the car has a slight shutter. Not sure if this is the engine or transmission. But when going about 30 mph it seems fine. When I get to about 45 mph or higher the RPM's seem to drop off about 500 and the car shutters hard. I have to leave off the gas pedal and give more gas to get the RPM's to go back up and get the power to go faster. This will hold for about 3-5 seconds then drop back down. So I have to keep pumping the gas pedal about every 3-5 seconds to keep going. If I try and give more gas while the RPM's have already dropped the car just shutters bad. I have to actually leave off the pedal entirely then re-apply to get this to work. I was not sure if it was the fuel pump loosing pressure, or the fuel pressure regulator going bad, or the overdrive switch failing and engaging too early or what. I have replaced the fuel filter and plugs and wires to no prevale. Please help!!!! Thanks so much.

Customer (name blocked for privacy)
Status:  Closed   Value: $15
Answer
March 26 12:07 AM (2 hours and 35 minutes and 9 seconds later)
         
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